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1. (WO2013154779) NANOCRYSTAL-POLYMER NANOCOMPOSITE ELECTROCHROMIC DEVICE
Note: Text based on automatic Optical Character Recognition processes. Please use the PDF version for legal matters

CLAIMS

What is claimed is:

1. An electrochromic nanocornposite film comprising:

a solid matrix of an oxide based material, the solid matrix comprising:

a plurality of transparent conducting oxide (TCO) nanostructures dispersed in the solid matrix; and

a lithium salt dispersed in the solid matrix.

2. The electrochromic nanocornposite film of claim 1 , wherein the plurality of TCO nanostractures comprise at least one of tin-doped indium oxide (lΤΟ), aluminum doped zinc oxide (AZO), indium-doped zinc oxide (lΖΟ), gallium-doped zinc oxide (GZO), zinc, tin-doped indium oxide (ZITO), fluorine-doped tin oxide (FTO), or indium doped cadmium oxide (CdO:In).

3. The electrochromic nanocornposite film of claim 1 , wherein the oxide based material comprises a lithium ion-conducting solid polymer.

4. The electrochromic nanocornposite film of claim 3, wherein the lithium ion-conducting solid polymer comprises at least one of Poly(ethylene oxide) (PEO), Polymethylmethacrylate (PMMA), polyvinyl butyral) (PVB), or cross-linked Poly(ethylene glycol),

5, The electrochromic nanocornposite film of claim 3, wherein a weight ratio of the TCO nanostractures to the lithium ion-conducting solid polymer is approximately 1 : 10 to approximately 2: 1.

6, The electrochromic nanocornposite film of claim 1, wherein the oxide based material comprises a block copolymer comprising a first polymer that conducts lithium and a second polymer that interacts with surfaces of the plurality of TCO nanostructures,

7. The electrochromic nanocornposite film of claim 1, wherein the electrochromic nanocornposite film has a thickness of approximately 50-5000 nanometers, is selective in a near infrared (NIR) portion of an electromagnetic spectrum, and is transparent in a visible portion of the electromagnetic spectrum.

8. An electrochromic device comprising:

a transparent substrate; and

an electrode on the transparent substrate, the electrode comprising a first transparent conducting layer and an electrochromic nanocornposite layer, wherein the electrochromic nanocornposite layer comprises:

a first polymer having a solid matrix;

a first plurality of transparent conducting oxide (TCO) nanostructures with electrochromic properties dispersed within the solid matrix of the first polymer; and

a lithium salt dispersed within the solid matrix of the first polymer.

9. The electrochromic device of claim 8, wherein the first plurality of TCO nanostructures comprise at least one of tin-doped indium oxide (ITO), aluminum doped zinc oxide (AZO), indium-doped zinc oxide (IZO), gallium-doped zinc oxide (GZO), zinc, tin-doped indium oxide (ZITO), fluorine-doped tin oxide (FTO), or indium doped cadmium oxide (CdQ:In),

30, The electrochromic device of claim 8, wherein the first polymer is a lithium ion-conducting solid polymer comprising at least one of Poly(ethylene oxide) (PEO),

Polymethylmethacrylate (PMMA), polyvinyl hutyral) (PVB), cross-linked Polyethylene glycol), or a block copolymer PEO-biock-poIy (N, N-dimethylacrylamide) (PEO-b-PDMA).

1 1. The electrochromic device of claim 8, further comprising:

a counter electrode, comprising a second transparent conducting layer and an additional nanocomposite layer, wherein the additional nanocomposite layer comprises:

a second polymer having a solid matrix;

a second plurality of TCO nanostructures dispersed within the solid matrix of the second polymer; and

the lithium salt dispersed within the solid matrix of the second polymer; and a solid electrolyte layer separating the electrode from the counter electrode.

12. The electrochromic device of claim 1 1, wherein:

the second plurality of TCO nanostructures comprise at least one of cerium oxide, undoped indium oxide, undoped zinc oxide, or Fe7(CN)18;

the second polymer is a lithium ion-conducting solid polymer comprising at least one of Polyethylene oxide) (PEO) Polymethylmethacrylate (PMMA), or poly(vinyl butyral) (PVB),; and

the solid electrolyte layer is a lithium ion-conducting solid polymer comprising at least one of PEO, PMMA, or PVB.

13. A method comprising:

providing a plurality of transparent conducting oxide (TCO) nanostructures;

stripping ligands from surfaces of the plurality of TCO nanostructures in a first solution; dispersing the TCO nanostructures in a second solution comprising a polymer and polar solvent; and

depositing the second solution onto a substrate to form a nanocomposite film having a solid polymer matrix with the TCO nanostructures dispersed in the solid polymer matrix.

14. The method of claim 13, wherein the first solution comprises a solvent and at least one of nitrosonium ietrafluoroborate (NOBF4) or triethyloxonium ietrafluoroborate dissolved in the solvent, and wherein at least a portion of the stripped ligands are replaced by [BF4 ]- anions.

15. The method of claim 14, wherein the first solution further comprises N,N-dimethyl formamide (DMF), and wherein at least a portion of the stripped ligands are replaced DMF molecules.

16. The method of claim 13, wherein the polar solvent comprises one of acetonitrile, water, or ethanol.

17. The method of claim 13, wherein the second solution further comprises up to 5% N,N-dimethyl fonnamide (DMF).

18. The method of claim 13, wherein the TCO nanostruetures comprise at least one of tin doped indium oxide (ITG), aluminum doped zinc oxide (AZO), indium-doped zinc oxide (IZO), gallium-doped zinc oxide (GZO), zinc, tin-doped indium oxide (ΖΪΤΟ), fluorine-doped tin oxide (FTO), or indium doped cadmium oxide (CdO:In).

19. The method of claim 13, wherein depositing the second solution onto the substrate comprises performing one of a spin casting, drop casting, spray coating, dip coating, slot die coating, or doctor blade technique.

20. The method of claim 13, wherein the polymer is a lithium ion-conducting polymer comprising at least one of PoIy(ethylene oxide) (PEO), Polymethylmethacrylate (PMMA), polyvinyl butyral) (PVB), or a block copolymer PEO-biock-poiy (Ν, N-dimethylacrylamide) (PEO-b-PDMA).

21. The method of claim 13, wherein the polymer comprises Poly(ethylene glycol) dimethacryiate, the method further comprising:

curing the nanocomposite film using ultraviolet radiation to form cross linked

Poly(ethyiene glycol),

22. The method of claim 13, wherein the second solution further comprises a lithium salt.